TY - GEN
T1 - Field investigation of blast-induced damage of the sedimentary strata rock mass at PT Kaltim Prima Coal, Indonesia
AU - Simangunsong, G. M.
AU - Yulianto, E.
AU - Kramadibrata, S.
AU - Matsui, K.
AU - Shimada, H.
AU - Kubota, S.
AU - Ogata, Y.
PY - 2004/1/1
Y1 - 2004/1/1
N2 - Five blasting operations at two different pits within PT Kaltim Prima Coal (KPC) were carefully investigated. The areas of interest were Harapan South Pit and Melawan Thiess Pit. The field investigation was carried out to measure the significance of the blast induces fractures within a rock mass. First of all, investigation holes were made and drilled relatively perpendicular with blasting row at near distance behind the last blasting row. To quantitatively determine rock mass fractures, a borehole camera was applied to investigate cracks before and after the blast. A vibration geophone was arranged close to the collar of each investigation hole to monitor peak particle velocity (PPV) of the ground surface. Plotting the PPV as a function of distance divided by cube root or square root of the explosive weight was employed to predict attenuation or decay the PPV. From the data obtained, it was found that the cracks increase proportionally with the PPV.
AB - Five blasting operations at two different pits within PT Kaltim Prima Coal (KPC) were carefully investigated. The areas of interest were Harapan South Pit and Melawan Thiess Pit. The field investigation was carried out to measure the significance of the blast induces fractures within a rock mass. First of all, investigation holes were made and drilled relatively perpendicular with blasting row at near distance behind the last blasting row. To quantitatively determine rock mass fractures, a borehole camera was applied to investigate cracks before and after the blast. A vibration geophone was arranged close to the collar of each investigation hole to monitor peak particle velocity (PPV) of the ground surface. Plotting the PPV as a function of distance divided by cube root or square root of the explosive weight was employed to predict attenuation or decay the PPV. From the data obtained, it was found that the cracks increase proportionally with the PPV.
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U2 - 10.4028/www.scientific.net/msf.465-466.175
DO - 10.4028/www.scientific.net/msf.465-466.175
M3 - Conference contribution
AN - SCOPUS:8644271706
SN - 9780878499502
T3 - Materials Science Forum
SP - 175
EP - 180
BT - Explosion, Shock Wave and Hypervelocity Phenomena in Materials
A2 - Itoh, Shigeru
A2 - Hokamoto, K.
A2 - Fujita, Masahiro
PB - Trans Tech Publications Ltd
T2 - Proceedings of the 1st International Symposium on Explosion, Shock Wave and Hypervelocity Phenomena (ESHP Symposium)
Y2 - 15 March 2004 through 17 March 2004
ER -